Problem, help me pleas🙏

Copacabana.123 · Apr 6, 2025

Does anyone know what is the reason for the very slow vegetation and all the problems I have? This is my first time growing on coco 60% canna coco profesional 30% perlite 10% humus earthworms in 11L vases, lumatek LED 1000w I am in the 6th week of vegetation I have them at 50% about 1m away from the top of the plants. I use osmosis which gives me 0.0 EC water. I grow the amnesia variety for 10 weeks. I feed them with:
1.5ml/10L aptus regulator
then I add cal-mag to 0.7 EC
20ml/10L canna rizotonic
1x weekly canna zym10ml/10L
canna coco a+b 30ml/10L
Ph of the water for watering is 5.8
final EC 1.7-2.0
ph of the coco growing medium is 6.5-7.0
I feed them from 500 to 800ml every 2-3 days.

Ninjadogma · Apr 6, 2025

Looks like a pretty good grow off and running. How is the air flow around the plants?

Grownsince95 · Apr 6, 2025

They doing good! Looks like they're just getting some dry patches in the coco. It's important to never let it dry out.

Copacabana.123 · Apr 6, 2025

This is the ventilation around the plants. What kind of nutrient deficiency could this be, or is this some kind of disease because in the sixth week of vegetation, the plants should be much more developed.

Grownsince95 · Apr 6, 2025

It looks like a calcium issue. It happens when the coco dries out between waterings and when there isn't enough runoff through the pots.

What kind of system are you using for watering and disposing of runoff? Or are you watering them like plants in soil?

Galgrows · Apr 6, 2025

To me they don't look bad for 6wk old. I'm by no means on a scale of growing like yourself but they look like 6wk old haze plants. It sounds like you really got the grow down. These were clones to begin with?

Copacabana.123 · Apr 6, 2025

Grownsince95 said:
It looks like a calcium issue. It happens when the coco dries out between waterings and when there isn't enough runoff through the pots.

What kind of system are you using for watering and disposing of runoff? Or are you watering them like plants in soil?

I water by hand, for now it's still like in the ground without water draining. I feel it dries out to 20% humidity in the vase.

Copacabana.123 · Apr 6, 2025

Galgrows said:
Meni se ne zdijo slabi za 6 tednov. Nikakor nisem na lestvici rasti kot ti, vendar so videti kot 6 tednov stare rastline v meglici. Zdi se, kot da ste res zrasli. So bili to kloni na začetku?

Yes clones

Grownsince95 · Apr 6, 2025

Copacabana.123 said:
I water by hand, for now it's still like in the ground without water draining. I feel it dries out to 20% humidity in the vase.

Don't let the coco ever dry out. Run more of your feed through the pots and the problem should go away and the plants will grow great.

Read up on watering coco coir and it's relationship with calcium it's fascinating stuff.

Copacabana.123 · Apr 6, 2025

Grownsince95 said:
Don't let the coco ever dry out. Run more of your feed through the pots and the problem should go away and the plants will grow great.

Read up on watering coco coir and it's relationship with calcium it's fascinating stuff.

Thank you very much, I will try as you said and let you know in a few days if there is any progress.

Ninjadogma · Apr 6, 2025

Copacabana.123 said:
This is the ventilation around the plants. What kind of nutrient deficiency could this be, or is this some kind of disease because in the sixth week of vegetation, the plants should be much more developed.

pH

Ninjadogma · Apr 6, 2025

Ninjadogma said:
pH

Check your runoff pH. If it's at least 6.0 it probably wasn't at some point (hence the damage and deficiency you see) and if it's below that, bring it up a notch so it is.

If pH is good then the damage was already done and you're stuck looking at it, but you shouldn't see any new happening. There's a couple indicators, the cal and mag deficiency is one an the other is the small brown spots at the serrated points of a leaf. That's where leaves "weep" and seeing the Brown spots there is a sign of low pH or nute burn, so you have two separate symptoms of low pH that I can see. Again it might be okay now but the damage says it wasn't, and you'll want to check to confirm it's not ongoing.

Grownsince95 · Apr 6, 2025

Ninjadogma said:
Check your runoff pH. If it's at least 6.0 it probably wasn't at some point (hence the damage and deficiency you see) and if it's below that, bring it up a notch so it is.

If pH is good then the damage was already done and you're stuck looking at it, but you shouldn't see any new happening. There's a couple indicators, the cal and mag deficiency is one an the other is the small brown spots at the serrated points of a leaf. That's where leaves "weep" and seeing the Brown spots there is a sign of low pH or nute burn, so you have two separate symptoms of low pH that I can see. Again it might be okay now but the damage says it wasn't, and you'll want to check to confirm it's not ongoing.

Correct!! And you fix that pH problem by running a lot more feed through the medium at the correct pH and keep it that way!

That will make the Ca available to the plant again.

closettrapper217 · Apr 6, 2025

At first I had so many problems when I switched to coco because I was treating it like soil. Until someone explained to me how to properly use it. since I started watering my coco until run off and never letting it dry out completely I’ve been much more successful.

closettrapper217 · Apr 6, 2025

Also I keep my Ph around 6.0 sometimes a little more or less but not by much

Grownsince95 · Apr 6, 2025

closettrapper217 said:
At first I had so many problems when I switched to coco because I was treating it like soil. Until someone explained to me how to properly use it. since I started watering my coco until run off and never letting it dry out completely I’ve been much more successful.

That's because coco is hydro disguised as soil! It has more in common with DWC than people think.

closettrapper217 · Apr 6, 2025

Grownsince95 said:
That's because coco is hydro disguised as soil! It has more in common with DWC than people think.

Yeah. I also stopped going to the grow store where the guy told me “it’s just like soil “ haha

Copacabana.123 · Apr 6, 2025

When I read it, I immediately went to get tested, and I think the results are ok??

SoSoBurntToast · Apr 6, 2025

I also grow in coco and think the problem is with letting them dry so much and why your medium ph is high. Id be watering them 2-3 times a day rather than every 2-3 days

Glomus · Apr 6, 2025

Coco coir can have all kinds of issues when your growing with it at scale in larger containers, There are different types of coco coir too with different structures. Biggest problems I've seen with coco coir is can retain too much water for too long. But it's a soilless medium so it should never dry out completely. I think you have to dial the water more accurately with it, does very well with drip emitters. Also coco coir can contain lots of salt depending on the source you get it from, I think it's good practice to flush new coco coir before using it. To me this looks like nutrient lock out but I think they will be fine if you don't bombard them with too many nutes. If your worried about a cal mag deficiency use a cal mag sup as a foliar cuz if the roots are locked out, which it does look like they are hurting, the cal mag will get in the plant better with a foliar.

Problem, help me pleas🙏

Problem, help me pleas🙏

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